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I recently started coding in Python. In the beginning of my scripts I always have the following import: import numpy as np .

In one of my scripts, I use np.matlib.repmat function. It used to work ok, however recently it fails to run showing the following error:

 AttributeError: module 'numpy' has no attribute 'matlib'
I searched SO for this problem, and it looks like the error like this arises if one has a script called numpy.py in his working directory or if the installed version is different and does not contain the called module.
I didn't name any file numpy.py. I also found out that after I call:
 from numpy import matlib as mb
I can use mb.repmat. Therefore, my numpy module does contain matlib module.
Can someone hint me, why I cannot call np.matlib?
  
This is because numpy.matlib is an optional sub-package of numpy
  that must be imported separately. When you import just numpy without
  the sub-package matlib, then Python will be looking for .matlib as an
  attribute of the numpy package. This attribute has not been assigned
  to numpy without importing numpy.matlib
                If it's already answered in such detail as the link you shared, you should flag as a duplicate.
– roganjosh
                Apr 19, 2018 at 17:25